Yeah halberdiers are pretty good but the poor morale stat is just to much, theproblem is they lack staying power and often run if a strong charge hits them, whereas some units wont run if say 15 out of the 60 men die from a charge halberdiers will quickly give up and flee.
Swiss halb's havent got great defence but theyll cut through cavalry even faster and the charge is davastating, not sure if they are better than billmen its hard to say both the same but slightly different ways to use them well. Also maybe not as important but still swiss halbs are faster than regular ones sometimes regular halbs are painfully slow.
I use swordsmen as the centre depending on the enemy and what kind of swordsmen i can train, swabian swordsmen are brilliant but if the enemy has cavalry heavy armies i use swordsmen on the wings and spearmen in the centre.
The army I use for the byzantines is 6 byzantine infantry, 2 units of varangians, 2 units of allagions, 2 units of kataphraktoi, 2 units of pikemen, 2 units of trebizond archers.
Its four byzantine infantry in a line in the centre, the 2 units of trebizonds behind them in the centre, one unit of varnagians on either side of the archers, the 1 pikemen unit on either side of the byzantine infantry, 2 units of byz infantry on the deep flanks as reserves and the kataphraktoi and allagions on the wings.
Thatll beat most enemy armies, it may not be very anti cavalry heavy but the amount of heavy cavalry in that army is more than enough to defeat enemy heavy cavalry.
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